Fiber-Integrated Tamm Plasmon Polariton System

Plasmonic devices have witnessed their success in optical applications due to the boosted light-matter interactions in the subwavelength scale. Among them, optical fiber-based configurations offer excellent portability and accessibility. Here, we report a novel kind of plasmonic fiber devices by introducing Tamm plasmon polaritons (TPPs) into the fiber-optic community. TPPs are cavity modes confined between a distributed Bragg reflector (DBR) and a metallic layer, resulting in high quality factor ∼100, strong field-intensity enhancement of 92, immunity to ambient perturbations, and flexible tunability. As the fabrication process only requires thin-film deposition, fiber-based TPP system is relatively low-cost and high-repeatability. This scenario extends the scope of plasmonic devices and open up new perspectives for active and passive fiber-optic systems.